Digital license is a simpler and more efficient way of activation/authorization newly adopted by Windows 10, which only relies on the configuration information of your computer hardware. After activating system for the first time, as long as you don't change the CPU and other devices connected to the mainboard, you can feel free to connect to Microsoft server to repeatedly, automatically and permanently activate your Windows 10 at any moment, without having to input the product key again and again every time you install the system.